Controller and user interface for dialogue enhancement techniques
A plural-channel audio signal (e.g., a stereo audio) is processed to modify a gain (e.g., a volume level or loudness) of an estimated dialogue signal (e.g., dialogue spoken by actors in a movie) relative to other signals (e.g., reflected or reverberated sound). In some aspects, a controller is used to control master volume and dialogue volume. In some aspects, one or more graphical objects and/or user interface elements are used to indicate volume levels and other information.
1. An apparatus for processing a multi-channel audio signal, comprising:
a dialogue estimator configurable for receiving the multi-channel audio signal including at least a dialogue signal, for determining a gain value for at least one channel of the multi-channel audio signal, for determining an inter-channel correlation between at least two channels, determining a location of the dialogue signal based on at least one of the gain value and the inter-channel correlation, and for identifying the dialogue signal based on the location of the dialogue signal;
a dialogue volume control;
a master volume control; and
a circuit operatively coupled to the dialogue volume control, the master volume control and the dialog estimator, configurable for receiving at least one of a dialogue control signal and a master control signal, the dialogue control signal being used for adjusting the dialogue volume of the identified dialogue signal and the master control signal being used for adjusting the master volume of the multi-channel audio signal, respectively, and modifying at least one of the dialogue volume and the master volume based on at least one of the dialogue volume control signal and the master volume control signal.
2. The apparatus of claim 1 , wherein the dialogue volume control signal is used for adjusting dialogue volume level of an audio signal relative to the master volume level or the volume level of one or more other audio signals.
3. The apparatus of claim 1 , wherein the dialogue volume control signal is used for boosting or attenuating dialogue volume.
4. The apparatus of claim 1 , where the dialogue volume of the audio signal increases or decreases incrementally by a predetermined amount in response to user interaction with the dialogue volume control.
5. The apparatus of claim 1 , where the visual appearance of the dialogue volume control or the master volume control is modified to indicate its function or activation.
6. The apparatus of claim 1 , where the dialogue volume control signal is used to generate one or more graphical objects on a display device for providing visual feedback indicating dialogue volume level.
7. The apparatus of claim 6 , where a first graphical object indicates master volume level and a second graphical object indicates dialogue volume level relative to master volume level or relative to a volume level of another audio signal.
8. The apparatus of claim 1 , where the dialogue volume control signal is used to generate an indicator that dialogue volume control is active.
9. The apparatus of claim 1 , wherein the multi-channel audio signal further includes a background signal.
10. The apparatus of claim 1 , further comprising a classifier to determine a probability that the dialogue signal is included in the multi-channel audio signal, and
wherein the dialogue estimator determines the location of the dialogue signal if the classifier determines the dialogue signal is included in the multi-channel audio signal.
11. A method for processing a multi-channel audio signal, comprising:
receiving the multi-channel audio signal including at least a dialogue signal;
determining a gain value for the multi-channel audio signal;
determining an inter-channel correlation between at least two channels;
determining a location of the dialogue signal based on at least one of the gain value and the inter-channel correlation;
identifying the dialogue signal based on the location of the dialogue signal;
receiving at least one of a dialogue control signal and a master control signal, the dialogue control signal being used for adjusting the dialogue volume of the identified dialogue signal and the master control signal being used for adjusting the master volume of the multi-channel audio signal, respectively; and
modifying at least one of the dialogue volume and the master volume based on at least one of the dialogue volume control signal and the master volume control signal.
12. The method of claim 11 , wherein the dialogue volume control signal is used for adjusting dialogue volume level of an audio signal relative to the master volume level or the volume level of one or more other audio signals.
13. The method of claim 11 , wherein the dialogue volume control signal is used for boosting or attenuating dialogue volume.
14. The method of claim 11 , wherein the multi-channel audio signal further includes a background signal.
15. The method of claim 11 , further comprising:
determining a probability that the dialogue signal is included in the multi-channel audio signal,
wherein the step for determining the location of the dialogue signal determines the location of the dialogue signal if it is determined that the dialogue signal is included in the multi-channel audio signal.